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A kind of recycling method of lithium battery ceramic diaphragm

A technology of ceramic diaphragm and recycling method, which is applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of lithium-ion battery resource recycling that plague the healthy development of lithium batteries, environmental pollution protection, and low recycling efficiency. To achieve the effect of improving resource recovery rate, less environmental pollution and efficient recovery

Active Publication Date: 2019-03-26
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lifespan of lithium-ion batteries is about 5 years. The resource recovery of a large number of decommissioned and scrapped lithium-ion batteries has become a problem that plagues the healthy development of the lithium battery industry. At the same time, the pollution problems generated during the recycling process have also brought pressure to environmental protection.
[0003] At present, the recycling of lithium-ion batteries mainly focuses on the recycling of current collectors (such as copper foil and aluminum foil) and lithium resources, and rarely involves the recycling of ceramic diaphragms, resulting in waste of resources, high labor costs and low recycling efficiency.

Method used

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  • A kind of recycling method of lithium battery ceramic diaphragm

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Embodiment 1

[0025] In the recycling of lithium battery ceramic separators, the residual power of the scrapped batteries is discharged through resistance discharge; the top cover of the battery is removed with a cutting machine, and the pole roll inside the battery is taken out, and crushed into 0.5-3 cm fragments with a crusher; the pole The volume fragments were put into the flotation agent N-methylpyrrolidone recovered by positive electrode coating, the ceramic diaphragm was separated by flotation method, and the residue was obtained after burning in a high-temperature furnace at 400 °C for 1 h; weigh 100 g residue, after washing with water, add 0.98 L dilute hydrochloric acid (6 mol / L) to treat for 2 h, then add 1 L ammonia water (6 mol / L) to generate Al(OH) 3 Precipitate out; Al(OH) 3 The precipitate was heated at 140 °C for 2 h to obtain inorganic powder γ-type Al 2 o 3 .

Embodiment 2

[0027] In the recycling of lithium battery ceramic separators, the residual power of the scrapped batteries is discharged through resistance discharge; the top cover of the battery is removed with a cutting machine, and the pole roll inside the battery is taken out, and crushed into 0.5-3 cm fragments with a crusher; the pole The volume fragments were put into the flotation agent N-methylpyrrolidone, the ceramic diaphragm was separated by flotation, and the residue was obtained after burning in a high-temperature furnace at 450 °C for 1 h; 100 g of the residue was weighed and washed with water. , add 0.98 L of dilute sulfuric acid (3 mol / L) to treat for 2 h, then add 0.98 L of sodium hydroxide solution (6 mol / L) to generate Al(OH) 3 Precipitate out; Al(OH) 3 The precipitate was heated at 140°C for 2 h to obtain inorganic powder γ-type Al 2 o 3 .

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Abstract

The invention provides a lithium battery ceramic diaphragm recovery method. The lithium battery ceramic diaphragm recovery method comprises the following steps: discharging the remnant electric quantity of a scrapped battery; mechanically disassembling to remove a battery shell, and smashing battery electrode rolls into fragments being 0.5-3cm; putting the electrode roll fragments into a flotation agent, separating a ceramic diaphragm by adopting a flotation method, and burning the ceramic diaphragm for 1h in a high-temperature furnace under the temperature condition of 380-450 DEG C to obtain residues; washing the residues by water, adding acid liquor to process the washed residues for 2-3h, and then adding alkali liquor to generate Al(OH)3 precipitates for separating out; and heating the Al(OH)3 precipitates for 2-5h under the temperature condition of 140-150 DEG C to obtain inorganic powder gamma type Al2O3. According to the lithium battery ceramic diaphragm recovery method, the ceramic diaphragm can be recovered efficiently, the resource recovery rate of a lithium battery is increased, and the resources can be recycled.

Description

technical field [0001] The invention relates to the technical field of lithium battery recycling, in particular to a method for recycling a lithium battery ceramic diaphragm whose ceramic component is aluminum oxide or boehmite, in particular to a method for recycling a lithium battery ceramic diaphragm. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density, long cycle life, and no memory effect. They are widely used in 3C consumer goods, electric vehicles and other fields. The lifespan of lithium-ion batteries is about 5 years. The resource recovery of a large number of decommissioned and scrapped lithium-ion batteries has become a problem that plagues the healthy development of the lithium battery industry. At the same time, the pollution problems generated during the recycling process have also brought pressure to environmental protection. [0003] At present, the recycling of lithium-ion batteries mainly focuses on the recycl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 马留可李慧
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY